Method of manufacturing car-seal pockets.



PATENTED JULY 3, 1906,.

W. T. PRICE. l METHOD 0F MANUFACTURING OAR SEAL POCKET".

APPLICATION FILED MAR. 13. 1906.

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UNITED STATES inijnNr OFFICE.

METHOD OF MANUFACTURING CAR-SEAL POCKETS.

Specification of Letters Patent.

Patented July 3, 1906.

Application iiled March 13, 1906x Serial No. 305,848.

To all whom, if WMI/y concern:

Be it known that I, WILLIAM T. PRICE, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Methods of Manufacturing Car-Seal Pockets, of which the following is a specification.

This invention relates to a method of manufacturing car-seal pockets 5 and my object is to evolve an inexpensive process for manufacturing car-seal pockets.

To this end the invention consists in certain novel and peculiar treatment of the materials used in the construction of the pockets, and in order that it may be fully understood reference is to be had to the accompanying drawings, in which- Figure l is a perspective view of a key and a. spring cariied by the same. Fig. 2 is a vertical section of the pocket, taken in the plane of one face ofthe key and spring and showing a paraffin filling in the interstices between the key and spring. Fig. 3 is a section on the line III III of Fig. 2. Fig. 4 is a view similar to Fig. 2, but with the paraffin omitted and the permanent locking-key secured in the pocket by means of the spring in place of the gon-locking or molding key illustrated in In carrying out the invention a piece of spring-wire is bent to approximately arrowhead form, l indicating the point of the arrow-head, 2 the sides, and 3 the barbs, the barbs being formed with forwardly-converging spring-catches 4, which lie within and substantially parallel the corresponding sides 2. A key 5, corresponding in gage approximately to the wire, is fitted into the arrow-head described, so that the flat faces of said key shall lie approximately in the plane of thev sides of said arrow-head, said key having a tongue 6, engaged at its opposite edges by the frontends of catches 4 and having its front end engaging or approximately engaging the inner side of the point l of the arrow-head. The width of the key is somewhat narrower than the space between the barbs and contiguous thereto at least, has its opposite edges parallel and a greater distance apart than the opposite edges of the tongue, and the key from a point approximately in transverse alinement with the barbs converges forwaidly at its side edges, as at 7, to the side edges of the tongue adjacent to the ends of the catches.

Paraf'fin 8 or an equivalent substance is filled into the interstices or openings between the tongue and arrow-head and also between the edges 7 of the key and the catches 4, as at 9. The key equipped with the spring arrow-head and paraffin filling is then supported in a mold (not shown) in any suitable or preferred manner, and the pocket proper, 10, is molded around the arrow-head and around the parallel edges of the shank of the key for a suitable distance rearward of the arrow head, as indicated in Fig. 2, the pocket being made of any suitable frangible material, but preferably of material which need not be subjected to a sufficient heat to set it to take the temper out of the spring.

If the molding and setting is accomplished while the material from which the pocket is formed remains in a cold state, which is the preferred method, the false key is withdrawn, and then the pocket is heated sufficiently to melt 4the paraffin, and in practice it has been' found that when the paraffin is melted it is absorbed by the pocket, so that the latter need not be inverted or treated in any manner to extract the melted paraffin. If the pocket is of such character that it will not absorb the melted paraffin, then it should be inverted to discharge such paraffin or some other method be employed to accomplish such object. After the paraffin is melted and absorbed or otherwise removed, so as to leave the spring-catches free to move toward or from each other, the molding-key is withdrawn, and the pocket is complete and ready for service. It is adapted in practice to receive an arrow-headed locking-key 11 of the character shown in Fig. 4, which is slipped into the mouth of the pocket and pressed forward therein, so as to cause the spring- 'catches 4 to move apart sufficiently to pei'- mit the headedlocking-key to pass beyond the catches and permit the latter to spring back behind the barbs of the locking-key and prevent the removal of the same unless the pocket is broken.

From the above description it will be apparent that I have evolved a method by which frangible car-seal pockets can be very economically produced and equipped with springs for the purpose of holding the locking-keys in said pockets.

IOO

Having thus described the invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The method of manufacturing car-seal pockets, equipped with springs, the same consisting in bending a piece of spring metal to the desired shape, then mounting the same on a non-headed key, and then lilling the interstices between said shaped spring metal and key with a plastic substance which will melt, and then molding a pocket around. said plastic substance, spring metal and the contiguous portion ol said key.

2. The method. of manufacturing car-seal pockets equipped with springs, the same consisting in bending a piece of spring metal to the desired shape, then mounting the same on a non-headed key, then filling the interstices between said shaped spring metal and key with a plastic substance which will melt,

then molding a pocket around said plastic substance, spring metal and the contiguous portion of said key, and then melting said plastic substance.

3. The method of manufacturing car-seal pockets equipped with springs, the same consisting in bending a piece of spring metal to the desired shape, then mounting the same on a non-headed key, then ililling the interstices between said shaped spring metal and key with a plastic substance which will melt, then molding a pocket around said plastic substance, spring metal and the contiguous portion of said key, then melting said plastic substance, and then withdrawing said key.

In testimony whereof l. all'iX my signature in the presence of two witnesses.

/VILLIAM T. PRICE.

Witnesses:

FRANK I. MAsoN, ELBRIDGE D. JACKSON. 

